TRACKPixx Demo 6 -- Creating a dynamic gaze follower with the TRACKPixx3
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.. Note::
    This demo requires TRACKPixx Revision 16 or later. You can check for recent firmware updates at vpixx.com/whatsnew

This demo is a simple interactive gaze follower. Thirteen dots are displayed on a black background, with the current x,y positions of the left and right eye overlaid. Users can toggle the follower on and off by pressing "U" (on) or "H" (off) on the keyboard. The follower can be set to display the position tracked from a single frame by pressing "D", or the mean position of the last 10 recorded frames by pressing "F". Clicking on fixated locations with the mouse will show the error between recorded eye position and screen location.

.. literalinclude:: ../DatapixxToolbox/DatapixxDemos/TPxGazeFollow.m
   :language: matlab
   :linenos: